Hi Ashley, it is a little surprising that your starter is developing hooch after only 12 hours, but I would try feeding it twice daily and see if this makes a difference in its activity level and appearance. Especially if you live in a warm climate, your starter may be fermenting and becoming depleted more rapidly. We generally recommend feeding your starter twice daily when you maintain it at room temperature, so a few days of this feeding regimen should bring your starter back to full vitality. Barb

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